Out-of-equilibrium properties and non-linear effects for interacting quantum impurity systems in their strong coupling regime

Understand

We provide an exact description of out-of-equilibrium fixed points in quantum impurity systems, that is able to treat time-dependent forcing.

• Building on this, we then show that analytical out-of-equilibrium results, that exactly treat interactions, can be obtained in interacting quantum impurity systems in their strong coupling regime, provided they are integrable \emph{at} equilibrium and they are "super Fermi liquids", i.e.
• they only allow for integer charge hopping.
• For such systems we build an out-of-equilibrium strong coupling expansion, akin to a Sommerfeld expansion in interacting systems.